公开(公告)号：US11523314B2

公开(公告)日：2022-12-06

申请号：US17142638

申请日：2021-01-06

Applicant: Cisco Technology, Inc.

Inventor： Akram Ismail Sheriff ,  Xiaoguang Jason Chen ,  Jun Liu ,  Robert Edgar Barton ,  Jerome Henry

IPC: H04W36/00 ,  H04W4/40 ,  H04W36/32 ,  H04W36/30 ,  H04W36/38

Abstract: In one embodiment, a device in a wireless network receives telemetry data from a plurality of autonomous vehicles. The telemetry data is indicative of radio signal quality metrics experienced by the vehicles at a particular location over time. The device forms an array of wireless roaming thresholds by applying regression to the telemetry data. The device computes an optimum roaming threshold from the array of wireless roaming thresholds to be used by the vehicles when approaching the location. The device triggers, based on the computed optimum threshold, one or more of the autonomous vehicles to initiate access point roaming when approaching the particular location.

公开(公告)号：US10412643B1

公开(公告)日：2019-09-10

申请号：US16172747

申请日：2018-10-27

Applicant: Cisco Technology, Inc.

Inventor： Jun Liu ,  Qiang Yang ,  Jiewei Li ,  Xia Ke

IPC: H04W36/00 ,  H04W4/20 ,  H04W8/26 ,  H04W36/18 ,  H04W48/16

Abstract: Off channel scanning on workgroup bridge (WGB) devices for fast roaming may be provided. First, it may be determined, by a first WGB, that a second WGB is not off-channel. The second WGB may be peered with the first WGB. Next, the first WGB may perform channel scanning in response to determining that the second WGB is not off-channel. The first WGB may then prioritize a first WGB channel list based on results from the channel scanning performed by the first WGB. Next, the first WGB may roam while the second WGB in not off-channel, from a first access point to a second access point on a channel with the highest priority in the first WGB channel list.

公开(公告)号：US20150309894A1

公开(公告)日：2015-10-29

申请号：US14264526

申请日：2014-04-29

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Chao Zhou ,  Will Lipeng Jiang ,  Jun Liu

IPC: G06F11/20 ,  H04L12/707

CPC classification number: G06F11/2023 ,  H04L45/02 ,  H04L45/22 ,  H04L45/28

Abstract: According to one aspect, a control entity (such as a policy server) in communication with a plurality of border routers in a network, generates failover entries for one or more traffic flows. Each failover entry specifies a backup path to be used by a border router when the border router determines that a wide area network interface of the border router has failed. The control entity sends the failover entries to each of the border routers. A border router operating in a network stores failover entries for one or more traffic flows. For packets received at the border router either from a local area network interface or via a tunnel from another border router, when the border router detects that the wide area network interface has failed, the border router determines how to handle the packets based on the stored failover entries.

Abstract translation: 根据一个方面，与网络中的多个边界路由器通信的控制实体（例如策略服务器）为一个或多个业务流生成故障切换条目。 每个故障转移条目指定当边界路由器确定边界路由器的广域网接口出现故障时要由边界路由器使用的备份路径。 控制实体将故障转移条目发送到每个边界路由器。 在网络中运行的边界路由器存储一个或多个流量流的故障转移条目。 对于从边界路由器接收的分组，从局域网接口或通过另一边界路由器的隧道接收到的报文，当边界路由器检测到广域网接口出现故障时，边界路由器根据所存储的路由器确定如何处理报文 故障切换条目。

公开(公告)号：US12068783B2

公开(公告)日：2024-08-20

申请号：US17688114

申请日：2022-03-07

Applicant: Cisco Technology, Inc.

Inventor： Xiangpeng Yao ,  Jianquan Lou ,  Alpesh Umakant Bhobe ,  Baojun Zhang ,  Jun Liu

IPC: H04B10/2525

CPC classification number: H04B10/25253

Abstract: A method in which a plurality of transmit signals are generated at data rates that are offset from each other by inserting an idle data block into a data stream for one or more transmit signals of the plurality of transmit signals to increase a data rate for the one or more transmit signals, thereby minimizing detectable electromagnetic interference at a particular frequency. The method further includes converting each transmit signal of the plurality of transmit signals to a corresponding optical transmit signal of a plurality of optical transmit signals for transmission via a corresponding channel of a plurality of channels of an optical network device and transmitting the plurality of optical transmit signals via respective ones of the plurality of channels for transmission on respective optical fibers.

公开(公告)号：US10904805B1

公开(公告)日：2021-01-26

申请号：US16659630

申请日：2019-10-22

Applicant: Cisco Technology, Inc.

Inventor： Akram Ismail Sheriff ,  Xiaoguang Jason Chen ,  Jun Liu ,  Robert Edgar Barton ,  Jerome Henry

IPC: H04W24/02 ,  H04W36/00 ,  H04W36/32 ,  H04W36/38 ,  H04W4/40

Abstract: In one embodiment, a device in a wireless network receives telemetry data from a plurality of autonomous vehicles. The telemetry data is indicative of radio signal quality metrics experienced by the vehicles at a particular location over time. The device forms an array of wireless roaming thresholds by applying regression to the telemetry data. The device computes an optimum roaming threshold from the array of wireless roaming thresholds to be used by the vehicles when approaching the location. The device triggers, based on the computed optimum threshold, one or more of the autonomous vehicles to initiate access point roaming when approaching the particular location.

公开(公告)号：US20240073759A1

公开(公告)日：2024-02-29

申请号：US17896701

申请日：2022-08-26

Applicant: Cisco Technology, Inc.

Inventor： Jun Liu ,  Yaojun WEI ,  Jianhui WU ,  Xia KE

IPC: H04W36/08 ,  H04W8/02 ,  H04W36/00

CPC classification number: H04W36/08 ,  H04W8/02 ,  H04W36/0061 ,  H04W36/00837

Abstract: In one embodiment, a wireless access point receives, from a mobile system, a broadcast beacon that includes a roaming notification indicating that the mobile system intends to roam to the wireless access point. The wireless access point allocates, after receiving the broadcast beacon from the mobile system, an orthogonal frequency-division multiple access resource unit for use by the mobile system. The wireless access point sends a trigger message to the mobile system that includes an indication of the orthogonal frequency-division multiple access resource unit. The wireless access point performs, after sending the trigger message, a handoff exchange with the mobile system using the orthogonal frequency-division multiple access resource unit to attach the mobile system to the wireless access point.

公开(公告)号：US20190116482A1

公开(公告)日：2019-04-18

申请号：US16214444

申请日：2018-12-10

Applicant: Cisco Technology, Inc.

Inventor： Linyu Lu ,  Jun Liu ,  Xia Ke ,  Xiaoguang Jason Chen

IPC: H04W8/02 ,  H04W12/06 ,  H04W76/10

Abstract: An apparatus includes a first wireless bridge device configured to transmit signals to and receive signals from wireless network access points located along a pathway, and a second wireless bridge device configured to transmit signals to and receive signals from the wireless network access points. The first wireless bridge device and the second wireless bridge device are coupled to and communicate with each other. When the first wireless bridge device is wirelessly connected to a first access point and about to initiate a roaming mode to attempt to wirelessly connect to a second access point, the first wireless bridge device notifies the second wireless bridge device of the initiating of the roaming mode and determines whether the second wireless bridge device is in the roaming mode while the apparatus is moving along the pathway.

公开(公告)号：US20180288602A1

公开(公告)日：2018-10-04

申请号：US15472417

申请日：2017-03-29

Applicant: Cisco Technology, Inc.

Inventor： Linyu Lu ,  Jun Liu ,  Xia Ke ,  Xiaoguang Jason Chen

IPC: H04W8/02 ,  H04W76/02 ,  H04W12/06

CPC classification number: H04W8/02 ,  H04W12/06 ,  H04W76/10 ,  H04W92/10

Abstract: An apparatus includes a first wireless bridge device configured to transmit signals to and receive signals from wireless network access points located along a pathway, and a second wireless bridge device configured to transmit signals to and receive signals from the wireless network access points. The first wireless bridge device and the second wireless bridge device are coupled to and communicate with each other. When the first wireless bridge device is wirelessly connected to a first access point and about to initiate a roaming mode to attempt to wirelessly connect to a second access point, the first wireless bridge device notifies the second wireless bridge device of the initiating of the roaming mode and determines whether the second wireless bridge device is in the roaming mode while the apparatus is moving along the pathway.

公开(公告)号：US09678840B2

公开(公告)日：2017-06-13

申请号：US14264526

申请日：2014-04-29

Applicant: Cisco Technology, Inc.

Inventor： Chao Zhou ,  Will Lipeng Jiang ,  Jun Liu

IPC: H04L12/26 ,  G06F11/20 ,  H04L12/707 ,  H04L12/751 ,  H04L12/703

CPC classification number: G06F11/2023 ,  H04L45/02 ,  H04L45/22 ,  H04L45/28

Abstract: According to one aspect, a control entity (such as a policy server) in communication with a plurality of border routers in a network, generates failover entries for one or more traffic flows. Each failover entry specifies a backup path to be used by a border router when the border router determines that a wide area network interface of the border router has failed. The control entity sends the failover entries to each of the border routers. A border router operating in a network stores failover entries for one or more traffic flows. For packets received at the border router either from a local area network interface or via a tunnel from another border router, when the border router detects that the wide area network interface has failed, the border router determines how to handle the packets based on the stored failover entries.

公开(公告)号：US20160344622A1

公开(公告)日：2016-11-24

申请号：US14714611

申请日：2015-05-18

Applicant: Cisco Technology, Inc.

Inventor： Jun Liu ,  Zhiyong Fang ,  Bin Shi ,  Feng Cai

IPC: H04L12/721 ,  H04L12/46 ,  H04L12/931

CPC classification number: H04L45/38 ,  H04L12/4633 ,  H04L45/64

Abstract: A tunnel endpoint of a virtual network monitors the flows between the tunnel endpoint and at least one other tunnel endpoint. The virtual network spans a physical network. A flow identifier for each flow is determined based on packet headers of packets in each respective flow. A path identifier for each flow is also determined based on the packet headers of the packets in each respective flow. Each path identifier indicates a route that the respective flow takes in the physical network to reach the respective destination tunnel endpoint. The path identifier and the flow identifier of the respective flows are then transmitted to a controller of the virtual network.

Abstract translation: 虚拟网络的隧道端点监视隧道端点与至少一个其他隧道端点之间的流。 虚拟网络跨越物理网络。 每个流的流标识符基于每个相应流中的分组报头来确定。 每个流的路径标识符也是基于每个流中的分组的分组报头来确定的。 每个路径标识符指示相应流在物理网络中到达相应目的地隧道端点的路由。 然后将路径标识符和各个流的流标识符发送到虚拟网络的控制器。